Have you heard of an artist called Brom? I have a book of his artwork called Darkwerks and this looks very similar to his works in terms of style and the dark fantasy subject matter.

I have recently read Stitched- a comic set in a contemporary conflict in which a cult like group pour in a black substance and seal all the bodily orifices by stitching in order to keep the spirit in the body. A theme/idea that this also shares

That is the scariest fucking thing I have ever seen in my entire life. Holy shit wow. Great freaking job. so much detail. It managed to disturb me! And believe me, i have seen loads of scary shit on deviant art. A great illlustration. SO much detail. The centimade on his hand rly blends with all the sews on him. He is scary and that is how necromancer should be. Great freakin job!

I love it, it's just so metal! Probably not what you were going for, but with the gloom and the awesome hair... So intense. I didn't even see the title at first, but I got a necromancer vibe just from looking at the piece